Carbonaceous packing material for prebaked anode maufacture in open pit ring furnaces

Abstract

An improved method is provided for the production of heat-treated carbon bodies in open-pit, ring furnaces. In the improved process green carbon bodies are packed with a carbonaceous particulate packing material containing as a constituent green petroleum coke in a blend with calcined and/or recycled petroleum coke particles. Utilization of green petroleum coke, used primarily to replenish oxidized packing material in the ring furnace, results in significant energy and process cost savings. In the event the green petroleum coke is green delayed petroleum coke, the balance of the packing material is selected from calcined delayed petroleum coke, recycled packing material containing heat-treated delayed petroleum coke and/or mixtures of these; if the green petroleum coke used in the blend is green fluid petroleum coke, then the balance of the packing material is heat-treated calcined fluid coke. Low grade green delayed petroleum coke is allowed to be used in the packing material.

Dependencies are inferred from the claim text.